<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script>
			var str="你好，我是渣渣灰";
			alert(str[0]);
			
		</script>
	</head>
	<body onload="alert('加载了js-1')">
		<a href="js-9.html">第九个案例</a>
		<a href="js10.html">第10个案例</a>
	</body>
</html>